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场景如下:
我有一个java pojo类Name,它具有2个变量类型和name以及相应的getter和setters.我正在使用决策表流口水,我想要:
条件:当类型设置为“ 1”时
行动:调用名称类的setName setter并从excel设置适当的参数
现在,我要在java中访问name的此设置值.
这是我所做的事情:
名称.java-
public class Name{
String name,type;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
MainClass.java-有流口水的实现!
public class MainClass {
public static StatefulKnowledgeSession session;
public static KnowledgeBase kbase;
public static Name name;
public static void main(String args[])
{
init();
initialiseNameObject();
fireAllRules();
}
public static void init()
{
System.out.println("inside init");
KnowledgeBuilder kbuilder=KnowledgeBuilderFactory.newKnowledgeBuilder();
DecisionTableConfiguration dconf=KnowledgeBuilderFactory.newDecisionTableConfiguration();
dconf.setInputType(DecisionTableInputType.XLS);
dconf.setWorksheetName("rulesW");
kbuilder.add(ResourceFactory.newClassPathResource("/drools.xls",MainClass.class), ResourceType.DTABLE, dconf);
KnowledgeBuilderErrors errors=kbuilder.getErrors();
if(!errors.isEmpty())
{
System.out.println("Errors in package");
Iterator i=errors.iterator();
while(i.hasNext())
{
System.out.println("The error: "+i.next());
}
}
kbase=KnowledgeBaseFactory.newKnowledgeBase();
try
{
kbase.addKnowledgePackages(kbuilder.getKnowledgePackages());
session=kbase.newStatefulKnowledgeSession();
name=new Name();
}
catch(Exception e)
{
System.out.println("The exception "+e);
}
}
public static void initialiseNameObject()
{
System.out.println("insideNameObject");
name.setType("1");
}
public static void fireAllRules()
{
System.out.println("inside fire all");
session.fireAllRules();
System.out.println(name.getName());
}
决策表:
http://www.imageurlhost.com/images/tf2m0omib1jkt8wyjra8_Decision.png
问题是我无法获得名称..总是为此获得空值.名称应在对象中更新,并且我应该将ABCD作为输出.我想它必须对全局实例做些事情!
最佳答案
您的代码对我来说毫无意义.主要问题之一是,在创建StatefulKnowledgeSession之后,您没有在会话中插入任何对象.在会议中没有任何内容,我怀疑Drool可以做什么.
尝试做类似的事情:
name.setType(1);
session.insert(name); // Important! Drools need the objects to work on
// inserted to session
session.fireAllRules();
然后在决策表中,将操作更改为namea.setName($param)
我相信在进行此类更改后它应该可以工作
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转载注明原文:java-drools:访问drools excel决策表中的对象 - 乐贴网